/* Main Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f8fa;
    padding-bottom: 20px;
}

.card {
    border-radius: 8px;
    margin-bottom: 24px;
    border: none;
}

.card-header {
    border-radius: 8px 8px 0 0 !important;
}

.shadow {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1) !important;
}

/* Header & Footer */
header {
    border-radius: 0 0 8px 8px;
}

footer {
    border-radius: 8px 8px 0 0;
    margin-top: 30px;
}

/* Table Styles */
.table {
    margin-bottom: 0;
}

.table th {
    background-color: #f0f2f5;
    font-weight: 600;
}

/* Chart Containers */
canvas {
    max-height: 300px;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
}

/* Loading and Status */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

#refreshBtn {
    transition: all 0.3s;
}

#refreshBtn.spinning i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error and Info States */
.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}